Acegi configurable roles and Authorization

Dear all, I posted in another forum with not too much of specific help.Hence I post here. I need to make user groups and I need to be able to configure (without interfering with the code) those user groups in such a way that I can decide which user groups will have access to which jsps. Then within the jsps, before displaying all the fields. I need to check for the profile the user belongs to. If the user is a technician then only the tech. related fields are displayed. If the user is admin all the fields are displayed on the jsp.

I have been challenged in finding a proper approach that I can follow for this. I plan to use ACEGI with spring MVC.

I have read enough blogs, other posts and googled for it. Any advice on what direction I can follow, will be greatly appreciated.